Wire-size press-fit (P) drill bushings come in standard sizes that correspond to American Wire Gauge (AWG) sizes. The larger the wire size, the smaller the bushing. Thin-wall press-fit drill bushings save space and can be placed closer together than standard-wall press-fit drill bushings.Press-fit drill bushings (P), sometimes called jig bushings, are permanently pressed into a drilling jig and are ideal for single-step drilling operations where the drill bushings will not need to be replaced. Type P bushings install flush with the jig and are the most commonly used type of drill bushing. They don't have a head, so they can be placed closer together than headed bushings. However, they offer less resistance to heavy axial loads than headed bushings. Drill bushings are installed into a drilling jig to guide, support, and position a drill or other cutting tool during metalworking tasks. They keep the cutting tool from wandering or bending as it enters the workpiece, maximize chip clearance, and minimize the risk of marring the workpiece or the jig. Specifications: Item: Press-Fit Drill Bushing (P)Drill Bushing Wall Type: Thin WallHead Type: NoMeasurement System: WireInside Dia.: #39Decimal Equivalent: 0.0995Drill Size: 1-1/8\"Inside Dia. Tolerance: +0.0001\"/+0.0004\"Outside Dia.: 3/16\"Outside Dia. Tolerance: +0.0013\"/+0.0016\"Bushing Code: PBushing Head Type: HeadlessOverall Length: 1/2\"Head Material: High Speed SteelHeat Treatment: Through HardenedMaterial - Machining: High Speed SteelRockwell Hardness: RC 62-64"